Tsudzuki M, Wakasugi N
Laboratory of Animal Genetics, School of Agriculture, Nagoya University, Japan.
J Hered. 1988 May-Jun;79(3):160-4. doi: 10.1093/oxfordjournals.jhered.a110485.
The mutant ET (ear tuft) quail strain is characterized by an ear-opening abnormality frequently accompanied by ear tufts. The mutant ear opening is oval shaped with a fissure on its ventral margin, whereas the ear tufts project from the ventral end of the fissure or the posterior margin of the ear opening. The ear tufts are composed of a feathered peduncle. The size of the ear tufts and the ear-opening abnormality are variable. The incidence of the ear tufts and the ear-opening abnormality in the ET embryos at 15 days of incubation was 33% and 42%, respectively. Examination of early embryos revealed an incomplete closure of the hyomandibular furrow, the incidence of which was 91% in 5 day embryos. It appears that the hyomandibular furrow abnormality is the primary defect leading to the ear-opening and ear-tuft traits. Genetic analyses of hyomandibular furrow closure defect indicated it to be due to an autosomal recessive mutation. The proposed gene symbol is hfd.
突变型ET（耳簇）鹌鹑品系的特征是耳部开口异常，常伴有耳簇。突变型耳部开口呈椭圆形，腹侧边缘有一道裂缝，而耳簇从裂缝的腹端或耳部开口的后缘伸出。耳簇由有羽毛的柄组成。耳簇的大小和耳部开口异常情况各不相同。孵化15天时ET胚胎中耳簇和耳部开口异常的发生率分别为33%和42%。对早期胚胎的检查发现舌骨下颌沟闭合不完全，在5日龄胚胎中的发生率为91%。似乎舌骨下颌沟异常是导致耳部开口和耳簇特征的主要缺陷。舌骨下颌沟闭合缺陷的遗传分析表明这是由常染色体隐性突变引起的。提议的基因符号为hfd。
